As ideas become more open, many young people now experience the life of cohabitation before marriage. However, women must remember that they should not easily consider cohabitation as the first step in marriage, because once they are easily obtained by men, they will only reduce their sense of responsibility. Women must have a high cost of cohabitation before marriage and be cautious in cohabitation. Cost three: psychological cost through cohabitation, men’s psychological confidence is overwhelming, because they know how to please, cope with women, and have more experience for women; while cohabitation after love fails, women usually leave psychological shadows, more and more unconfident, When dealing with the next relationship, I prefer to get married instead of enjoying love. Cost 4: Social and Cultural Costs At present, for cohabitation, the society may be tolerant, but tolerance does not mean affirmation. From ancient times to the present, if a man breaks up and falls in love again and again, he will be called “the genius of the wind” and “the temperament”. This kind of experience, in the mouth of men, has also become the capital they show off. The same situation is not glamorous for women. Women are often considered to be “watery poplars” and “residual flowers and willows.” Cost five: physical health costs The physical characteristics of men and women determine the cohabitation, women are prone to infections and other diseases such as gynecological diseases. If you accidentally get pregnant, it will cause serious damage to women’s health. If you don’t handle it properly, it will leave sequelae. The risk of pregnancy is almost entirely borne by women. Many people think that as long as they think they are not losing money, the outside world’s views are not important. However, social culture is tolerant of men’s ethos, but it is very demanding for women. When women fall in love again or enter marriage, they must bear more public opinion than men. This is not fair, but it is reality, at least not at present.